Adding todo items

In the App component, there's also a text input that allows the user to enter new todo items. When they're done entering the todo item, Apollo Client will need to send a mutation to the backend GraphQL server. Here's what the component code looks like:

function App() {
  const [addTodo] = useMutation(ADD_TODO, {
    refetchQueries: [
      {
        query: GET_USER,
        variables: {
          userId: 'me',
        },
      },
    ],
  });
  return (
    <div>
      <section className='todoapp'>
        <header className=&apos...